I've just played through the lungfish level and was unable to access the menu (esc) during the boss fights, and I thought "Fair enough, no menu / saving on bosses".
But to my concern, I am now back at the lodge (nighttime now?), and unable to access the journal/menu, despite all other actions working perfectly. The game is still running in the background, since im not happy about quitting without saving.
Please help me, does anyone recognize this bug?